There is a list of strings and I want to check if the one I check has a value from there.
For example, the list is "good", "amazing", "bad", "better", "worse"
and this function:
checkPositive = (str) => {
if(str === "good" || str === "amazing" || str === "better") {
return true;
}
return false;
}
My question is if it's possible to do it more efficiently than it is now, I don't like how that if statement looks.
You could use an array and .includes:
checkPositive = str => ['good', 'amazing', 'better'].includes(str)
Build a dictionary:
let dict={
good: true
, amazing: true
, better: true
};
checkPositive = str => { return dict[str]; } // dict[str] ? true : false, if you need actual boolean values
You can use indexOf which will return -1 is the string is not present in list(assuming it is an array)
const strList = ["good", "amazing", "bad", "better", "worse"]
checkPositive = (str) => {
return strList.indexOf(str) !== -1 ? true : false;
}
console.log(checkPositive('good')) // true;
console.log(checkPositive('hello')) // true;You could also use Regular_Expressions as well to check the particular string
const checkPositive = str => /good|amazing|better/.test(str.toLowerCase());
console.log(`For bad ` +checkPositive('bad'));
console.log(`For amazing `+checkPositive('amazing'));